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authorJeff Layton <jlayton@redhat.com>2012-05-11 09:45:14 -0400
committerJ. Bruce Fields <bfields@redhat.com>2012-05-31 20:29:48 -0400
commitce0fc43c5a09d50ff5ffe208cbb0d3a9c82f038a (patch)
treece9842a9df9b30da17e35df89c6be0fbba8fdd7e /fs/nfsd
parent82c5ff1b1409f43ccb282cbdfcb06991714e4c5f (diff)
nfsd: wrap all accesses to st_deny_bmap
Handle the st_deny_bmap in a similar fashion to the st_access_bmap. Add accessor functions and use those instead of bare bitops. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
-rw-r--r--fs/nfsd/nfs4state.c37
1 files changed, 29 insertions, 8 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 83066abc66bb..c474161fd4b6 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -492,6 +492,27 @@ test_access(u32 access, struct nfs4_ol_stateid *stp)
return test_bit(access, &stp->st_access_bmap);
}
+/* set share deny for a given stateid */
+static inline void
+set_deny(u32 access, struct nfs4_ol_stateid *stp)
+{
+ __set_bit(access, &stp->st_deny_bmap);
+}
+
+/* clear share deny for a given stateid */
+static inline void
+clear_deny(u32 access, struct nfs4_ol_stateid *stp)
+{
+ __clear_bit(access, &stp->st_deny_bmap);
+}
+
+/* test whether a given stateid is denying specific access */
+static inline bool
+test_deny(u32 access, struct nfs4_ol_stateid *stp)
+{
+ return test_bit(access, &stp->st_deny_bmap);
+}
+
static int nfs4_access_to_omode(u32 access)
{
switch (access & NFS4_SHARE_ACCESS_BOTH) {
@@ -2462,7 +2483,7 @@ static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp,
stp->st_access_bmap = 0;
stp->st_deny_bmap = 0;
set_access(open->op_share_access, stp);
- __set_bit(open->op_share_deny, &stp->st_deny_bmap);
+ set_deny(open->op_share_deny, stp);
stp->st_openstp = NULL;
}
@@ -2541,8 +2562,8 @@ nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
ret = nfserr_locked;
/* Search for conflicting share reservations */
list_for_each_entry(stp, &fp->fi_stateids, st_perfile) {
- if (test_bit(deny_type, &stp->st_deny_bmap) ||
- test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap))
+ if (test_deny(deny_type, stp) ||
+ test_deny(NFS4_SHARE_DENY_BOTH, stp))
goto out;
}
ret = nfs_ok;
@@ -2814,7 +2835,7 @@ nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *c
}
/* remember the open */
set_access(op_share_access, stp);
- __set_bit(open->op_share_deny, &stp->st_deny_bmap);
+ set_deny(open->op_share_deny, stp);
return nfs_ok;
}
@@ -3687,12 +3708,12 @@ static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_ac
}
static void
-reset_union_bmap_deny(unsigned long deny, unsigned long *bmap)
+reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp)
{
int i;
for (i = 0; i < 4; i++) {
if ((i & deny) != i)
- __clear_bit(i, bmap);
+ clear_deny(i, stp);
}
}
@@ -3724,14 +3745,14 @@ nfsd4_open_downgrade(struct svc_rqst *rqstp,
stp->st_access_bmap, od->od_share_access);
goto out;
}
- if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) {
+ if (!test_deny(od->od_share_deny, stp)) {
dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
stp->st_deny_bmap, od->od_share_deny);
goto out;
}
nfs4_stateid_downgrade(stp, od->od_share_access);
- reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap);
+ reset_union_bmap_deny(od->od_share_deny, stp);
update_stateid(&stp->st_stid.sc_stateid);
memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));